Adjustable hook



FIG. 1 is a front perspective view of an adjustable hook showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a front elevation view thereof; and,

FIG. 8 is a rear perspective view shown in an environment of use.

The broken lines in FIG. 8 depict environmental subject matter of a rope and forms no part of the claimed design. 

CLAIM The ornamental design for an adjustable hook, as shown and described. 